Reacción #7705

Ecuación de reacción

[2-(4-acetamidophenylsulfanyl)-7-methoxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

BBr3

BBr3

→

[2-(4-acetamidophenylsulfanyl)-7-hydroxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

Disolventes

dichloroethane

dichloromethane

DCM

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONis added
2. 2
   OtroThe solvent is evaporated
3. 3
   workup.ADDITIONmethanol is added to the residue
4. 4
   Otroto quench residual BBr3
5. 5
   OtroThe solvent is evaporated in vacuo
6. 6
   workup.ADDITION1M HCl (2 mL) is added to the solid residue
7. 7
   FiltraciónThe solid is collected by filtration
8. 8
   workup.STIRRINGstirred for 2 hours at room temperature
9. 9
   FiltraciónThe solid is then collected by filtration
10. 10
    Lavadorinsed with water and diethyl ether

Procedimiento

A solution of [2-(4-acetamidophenylsulfanyl)-7-methoxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine (23 mg, 5.54.10−5 mol) in dichloroethane (3 mL) is treated with 1M BBr3 in dichloromethane (222 μL, 2.21.10−4 mol). The mixture os heated at 80° C. for 4 hours before 1M BBr3 in DCM (222 μL, 2.21.10−4 mol) is added. The reaction mixture is heated at 80° C. for a further 3 hours. The solvent is evaporated and methanol is added to the residue to quench residual BBr3. The solvent is evaporated in vacuo and this operation repeated 3 times. 1M HCl (2 mL) is added to the solid residue and the suspension stirred at room temperature for 15 hours. The solid is collected by filtration and suspended in a mixture water/EtOH (3/1, 8 mL). The mixture is neutralized with NaHCO3 and stirred for 2 hours at room temperature. The solid is then collected by filtration, rinsed with water and diethyl ether to give the desired [2-(4-acetamidophenylsulfanyl)-7-hydroxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine.

Fuente